@mixin size($width:20, $height: 30) {
    width: $width;
    height: $height;
}

@mixin icon($code, $size: 16px) {
    display: inline-block;
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    font-size: inherit;
    text-rendering: auto;
    font-style: normal;
    font-size: $size;
    &::before {
        content: $code;
    }
}